perf: cache mdx processor

package.json

@@ -7,7 +7,7 @@
 		"node": "20.x",
 		"pnpm": "9.x"
 	},
-	"packageManager": "pnpm@9.3.0",
+	"packageManager": "pnpm@9.4.0",
 	"scripts": {
 		"build": "run-s build:site generate:search-index",
 		"build:site": "astro build",
@@ -38,28 +38,28 @@
 	"dependencies": {
 		"@acdh-oeaw/lib": "^0.1.12",
 		"@acdh-oeaw/validate-env": "^0.0.3",
-		"@astrojs/mdx": "^3.1.0",
-		"@astrojs/node": "^8.3.0",
-		"@astrojs/react": "^3.5.0",
+		"@astrojs/mdx": "^3.1.1",
+		"@astrojs/node": "^8.3.1",
+		"@astrojs/react": "^3.6.0",
 		"@astrojs/rss": "^4.0.6",
-		"@astrojs/sitemap": "^3.1.5",
+		"@astrojs/sitemap": "^3.1.6",
 		"@floating-ui/dom": "^1.6.5",
 		"@fontsource-variable/inter": "^5.0.18",
-		"@iconify-json/lucide": "^1.1.192",
+		"@iconify-json/lucide": "^1.1.194",
 		"@keystatic/astro": "^5.0.0",
 		"@keystatic/core": "^0.5.18",
 		"@mdx-js/mdx": "^3.0.1",
 		"@pagefind/default-ui": "^1.1.0",
-		"@shikijs/rehype": "^1.6.5",
-		"astro": "^4.10.2",
+		"@shikijs/rehype": "^1.7.0",
+		"astro": "^4.11.0",
 		"astro-icon": "^1.1.0",
 		"cva": "^1.0.0-beta.1",
 		"date-fns": "^3.6.0",
 		"estree-util-value-to-estree": "^3.1.1",
 		"hast-util-heading-rank": "^3.0.0",
 		"hast-util-to-string": "^3.0.0",
 		"lucide-react": "^0.395.0",
-		"nodemailer": "^6.9.13",
+		"nodemailer": "^6.9.14",
 		"pagefind": "^1.1.0",
 		"pdfkit": "^0.15.0",
 		"react": "^18.3.1",
@@ -73,10 +73,10 @@
 		"retext-smartypants": "^6.1.0",
 		"satori": "^0.10.13",
 		"sharp": "^0.33.4",
-		"shiki": "^1.6.5",
-		"unified": "^11.0.4",
+		"shiki": "^1.7.0",
+		"unified": "^11.0.5",
 		"unist-util-visit": "^5.0.0",
-		"valibot": "^0.32.0",
+		"valibot": "^0.33.3",
 		"vfile": "^6.0.1",
 		"vite": "^5.3.1"
 	},
@@ -94,7 +94,7 @@
 		"@playwright/test": "^1.44.1",
 		"@types/hast": "^3.0.4",
 		"@types/mdx": "^2.0.13",
-		"@types/node": "^20.14.2",
+		"@types/node": "^20.14.6",
 		"@types/nodemailer": "^6.4.15",
 		"@types/pdfkit": "^0.13.4",
 		"@types/react": "^18.3.3",
@@ -109,6 +109,7 @@
 		"eslint-plugin-tailwindcss": "^3.17.3",
 		"is-ci": "^3.0.1",
 		"lint-staged": "^15.2.7",
+		"mdast-util-mdx-jsx": "^3.1.2",
 		"npm-run-all2": "^6.2.0",
 		"postcss": "^8.4.38",
 		"prettier": "^3.3.2",